Rectobolivina sp. A
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https://doi.org/ 10.26879/444 |
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https://treatment.plazi.org/id/A029445F-E970-FFD5-4A53-BB767170A736 |
treatment provided by |
Felipe |
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Rectobolivina sp. A |
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Figures 25.13, 25.14 View FIGURE 25
1961? Siphogenerina aff. dimorpha (Parker and Jones) var. pacifica Cushman — LeRoy (Part 1), p. 37, pl. 3, figs. 97, 98.
Description. Test small and short for the genus, approximately 0.4 mm in length, 0.2 mm in breadth, 0.1 mm in thickness; triangular in front view, oval in transverse section; chambers not inflated, increasing slowly as added; surface wall coarsely pitted with pores; sutures slightly depressed, weakly limbate; aperture oval with marginal rim at the top of test.
Remarks. This species resembles Siphogenerina aff. dimorpha var. pacifica Cushman as illustrated by LeRoy (1961), in having a compressed test with coarsely pored wall. Siphogenerina dimorpha var. pacifica Cushman (1926) has a cylindrical test with a near-circular cross section.
Occurrence. Common in the lower part of the Yonahama Formation.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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